| Effect of Y content on microstructure and mechanical properties of 2519 aluminum alloy |
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| 作者姓名： | 李慧中 梁霄鹏 李芳芳 郭菲菲 李洲 张新明 |
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| 作者单位： | School of Materials Science and Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | The effects of yttrium（Y） content on precipitation hardening, elevated temperature mechanical properties and morphologies of 2519 aluminum alloy were investigated by means of microhardness test, tensile test, optical microscopy（OM）, transmission electron microscopy（TEM） and scanning electron microscopy（SEM）. The results show that the tensile strength increases from 485 MPa to 490 MPa by increasing Y content from 0 to 0.10%（mass fraction） at room temperature, and from 155 MPa to 205 MPa by increasing Y content from 0 to 0.20% at 300 ~C. The high strength of 2519 aluminum alloy is attributed to the high density of fine 0＇ precipitates and intermetallic compound AICuY with high thermal stability. Addition of Y above 0.20% in 2519 aluminum alloy may induce the decrease in the tensile strength both at room temperature （20 ℃） and 300℃.
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| 关 键 词： | 2519铝合金 钇 微观结构 机械性质 |
| 收稿时间： | 15 July 2007 |
| 修稿时间： | 2007-07-15 |
Effect of Y content on microstructure and mechanical properties of 2519 aluminum alloy |
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| Hui-zhong LI, Xiao-peng LIANG, Fang-fang LI, Fei-fei GUO, Zhou LI,Xin-ming ZHANG.Effect of Y content on microstructure and mechanical properties of 2519 aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2007,17(6):1194-1198. |
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| Authors: | Hui-zhong LI Xiao-peng LIANG Fang-fang LI Fei-fei GUO Zhou LI Xin-ming ZHANG |
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| Affiliation: | School of Materials Science and Engineering, Central South University, Changsha 410083, China |
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| Abstract: | The effects of yttrium(Y) content on precipitation hardening, elevated temperature mechanical properties and morphologies of 2519 aluminum alloy were investigated by means of microhardness test, tensile test, optical microscopy(OM), transmission electron microscopy(TEM) and scanning electron microscopy(SEM). The results show that the tensile strength increases from 485 MPa to 490 MPa by increasing Y content from 0 to 0.10% (mass fraction) at room temperature, and from 155 MPa to 205 MPa by increasing Y content from 0 to 0.20% at 300 °C. The high strength of 2519 aluminum alloy is attributed to the high density of fine θ' precipitates and intermetallic compound AlCuY with high thermal stability. Addition of Y above 0.20% in 2519 aluminum alloy may induce the decrease in the tensile strength both at room temperature (20 °C) and 300 °C. |
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| Keywords: | 2519 aluminum alloy yttrium microstructure mechanical properties |
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